Nice weekend project. I wish I was that ambitious on the weekends--no telling what I would accomplish!
Looks like you have got plenty of room for more machines and signs!
I have a little room at the back of my property where I am planning to eventually build a second garage. My wife would like to park her car inside at some point in the future--at least in the winter. The current 3 car garage has too many bikes, toys, sports equipment from the kids and oh yeah--soda machines and all my other stuff. She would like to build something like the attached. That would give her a place for all my junk and a place to put me if I don't behave!
And I agree, a 48" Coke Button above the door would be a good way to save money on an extra window! Yeah right!